She found that, “ it isn ’ t only human beings who have personality, who are capable of rational thought emotions like joy and sorrow .” She also observed behaviors such as hugs, kisses, pats on the back, and even tickling, what we consider " human " actions.

She found that, “ it isn ’ t only human beings who have personality, who are capable of rational thought emotions like joy and sorrow .” She also observed behaviors such as hugs, kisses, pats on the back, and even tickling, what we consider identifiable human actions.

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